The National Academies of Sciences, Engineering, and Medicine released what was called "one of the most comprehensive studies of recent research on health effects" of recreational and therapeutic use of cannabis products earlier this year.

The academy considered more than 10,000 scientific abstracts and found nearly 100 conclusions. Click through the slideshow to see what some of the evidence did (or did not) suggest.

The National Academies of Sciences, Engineering, and Medicine released what was called "one of the most comprehensive studies of recent research on health effects" of recreational and therapeutic use of ... more

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Conclusive evidence:

Marijuana is good for treating chronic pain.

That's a big plus in light of the opioid painkiller epidemic, whcih many people believe could be curbed by medical marijuana. According to the research, opioids are more adept at handling acute pain.

Marijuana is effective for treating chemo-therapy-induced nausea and vomiting.

This is another one of those "anecdotal truths" that appears to be true in practice as well. Coupled with the findings on chronic pain, marijuana seems to be shaping up to be a proficient treatment for chemo's debilitating side-effects.

The study found "moderate" and "limited" evidence that marijuana use might worsen symptoms or risk for mental health issues (which can include depression, bipolar disorder, suicidal tendancies and anxiety disorders).

"The evidence reviewed by the committee suggests that cannabis use is likely to increase the risk of developing schizophrenia, other psychoses, and social anxiety disorders, and to a lesser extent depression. Alternatively, in individuals with schizophrenia and other psychoses, a history of cannabis use may be linked to better performance on learning and memory tasks."

Though smoking tobacco increases the risk for cancers like that of the lung, head and neck, the study says the evidence suggests that cannabis does not increase the risk for cancers (including testicular or in-utero risk).

The study found that learning, memory, and attention are impaired after immediate cannabis use, though there was "limited evidence" to suggest that there were impairments in cognitive domains of learning, memory, or attention in folks who stopped smoking.